Drivers in the St. Louis area may face delays this weekend. MoDOT has several closures planned for downtown as crews prepare to replace the driving surface on the Poplar Street Bridge. Lane closures will begin at 8 o'clock tonight be completed before 5 a.m. Monday. Closures will affect ramps from Interstate 70 and 64-40 to the Poplar Street Bridge, but before and after the Cardinals and Rams games there will be lanes open. Farther west, there will be a complete closure of westbound I-64 at the Boone Bridge on Saturday and Sunday. There will be no westbound access to St. Charles County using that route. Drivers will have to use the alternative river crossings at I-70, Route 364 or Route 370 to travel westbound into St. Charles.